Fail2Ban – Detector de Intrusos

Fail2ban para quem não conhece é uma ferramenta para detectar falhas de autenticação no Linux.

No vídeo, mostro como configurar no CentOS 7, bloqueando e enviando e-mail de alerta. 😉

https://www.youtube.com/watch?v=rF4ysGlXpLM

Nagios 4.2.4 – Curso Gratuito – Aula-13 Melhorando a Pesquisa

  Galera, assinem o canal e me ajude a divulgar 😉 ## Baixe o Arquivo search.cgi https://exchange.nagios.org/directory/Addons/Frontends-(GUIs-and-CLIs)/Web-Interfaces/CGI-Modifications/search-2Ecgi/details chmod 755 search.cgi cp search.cgi /usr/local/nagios/sbin/ vim /usr/local/nagios/share/side.php

Curso Gratuito de Nagios 4.2.4 – Aula 12 – Relatórios

Galera, assinem o canal e me ajude a divulgar 😉 ## Baixe o Arquivo search.cgi https://exchange.nagios.org/directory/Addons/Frontends-(GUIs-and-CLIs)/Web-Interfaces/CGI-Modifications/search-2Ecgi/details chmod 755 search.cgi cp search.cgi /usr/local/nagios/sbin/ vim /usr/local/nagios/share/side.php

Curso Gratuito de Nagios 4.2.4 – Aula 11 – Criando o próprio Plugin

vim /usr/local/nagios/libexec/check_site.sh #!/bin/bash ################################################################## ## ## ## lmcirilo at gmail.com ## ## ## ## Procura por duas palavras chaves no site ## ## ## ################################################################## if [ $# = 0 ] then echo “” echo “./check_site.sh [URL] [PalavraChave1] [PalavraChave2]” echo “” echo “Exemplo:” echo “” echo “./check_site.sh http://www.nagios.com reservados Contato” echo “” exit 1 fi […]

Curso Gratuito de Nagios 4.2.4 – Aula 10 – Monitorando Impressora via SNMP

SNMP – Simple Network Management Protocol MIB – Management Information Base OID – Object Identifier ## Comandos SNMP root@ubuntuServer:~# snmpwalk -v1 -c public IP | more root@ubuntuServer:~# snmpget -v1 -c public IP iso.3.6.1.2.1.1.3.0 ## Instalando as mibs no Ubuntu aptitude install snmp-mibs-downloader vim /etc/snmp/snmp.conf ### comentar a linha #mibs : ## baixe as mibs root@ubuntuServer:~# […]

Curso Gratuito de Nagios 4.2.4 – Aula 9 – Event Handler / Reiniciando Serviços Automaticamente

  ################## Cola ######################### ### Instalar o Apache no centOS7 [root@localhost ~]# yum install httpd nagios-plugins-nrpe ## Colocando na Inicialização e iniciando o apache [root@localhost ~]# systemctl enable httpd [root@localhost ~]# systemctl start httpd ## Descobrindo onde esta o comando systemctl [root@localhost ~]# which systemctl /usr/bin/systemctl ## Configurando o NRPE no CentOS7 vim /etc/nagios/nrpe.cfg command[ApacheRestart]=/usr/bin/sudo […]

Curso Gratuito de Nagios 4.2.4 – Aula 8 – HostGroup, ServiceGroup e Links

################## Cola ######################### ## HostGroup cd /usr/local/nagios/etc/linux/ vim hostgroup.cfg define hostgroup { hostgroup_name    LINUX alias                             LINUX members                   CentOS7, Nagios } cd /usr/local/nagios/etc/network/ vim HostGroupSites.cfg define hostgroup { hostgroup_name     SITES […]

Curso Gratuito de Nagios 4.2.3 – Aula 7 – Backup, Atualização e check_snmp

Linkedin: https://www.linkedin.com/in/luciano-cirilo-47b228128 # ——————— ## Cola ## ———————# cd /usr/local/ tar czf nagios423-bkp.tar.gz nagios/ rm /usr/local/nagios/share/{main,side,index}.php ## instalar o snmp antes de tudo aptitude install snmp snmpd ## baixar a ultima versao do nagios cd /usr/local/src/ mkdir update cd update wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.2.4.tar.gz ### Instalar tar zxvf nagios-4.2.4.tar.gz cd nagios-4.2.4/ ./configure –prefix=/usr/local/nagios –with-httpd-conf=/etc/apache2/sites-enabled/ –with-command-group=nagcmd –with-mail=/usr/bin/mail make […]

Curso Gratuito de Nagios 4.2.3 – Aula 6

Aula-06 Mapas, Ícones, Identificando problemas.  Linkedin: https://www.linkedin.com/in/luciano-cirilo-47b228128 # ——————— ## Cola ## ———————# ### identificar saída da internet traceroute http://www.uol.com.br ## adicionar host, alterar ip e nome cd /usr/local/nagios/etc/network/ cp uol.cfg gateway.cfg ## testar /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg /etc/init.d/nagios restart ## Mapa e logos cd /usr/local/nagios/share/images/logos ## http://IPdoNagios/nagios/images/logos/win40.jpg ## adicionar duas imagens wget https://nagiosnapratica.files.wordpress.com/2010/10/router2.png . wget […]

Curso Gratuito de Nagios 4.2.3 – Aula 5

Enviando E-mail de Alerta no Nagios utilizando Postfix e conta do Gmail.   # ——————— ## Cola ## ———————# ## Conf. gmail – Ativar https://www.google.com/settings/security/lesssecureapps ## postfix cd /etc/postfix/ vim main.cf ### conf para enviar email relayhost = [smtp.gmail.com]:587 smtp_use_tls = yes smtpd_tls_received_header = yes smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/contagoogle smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt smtp_sasl_security_options […]